Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1980-09-02
1983-02-08
Spitzer, Robert H.
Gas separation
Means within gas stream for conducting concentrate to collector
55 52, 528483, B01D 1900
Patent
active
043727581
ABSTRACT:
A degassing or purging process is disclosed for the removal of unpolymerized gaseous monomers from solid olefin polymers. The disclosed process comprises conveying the solid polymer, e.g. in granular form, to the top of a purge vessel by means of an inert gas stream, feeding an inert gas stream to the bottom of the purge vessel and countercurrently contacting the solid polymer with the inert gas purge stream to strip away the gaseous monomers evolved from the solid polymer, and recycling a portion of the resulting stream to the purge vessel. In one embodiment, the recycle serves as the conveying gas and in another embodiment as the purge stream. The process is especially useful in purging gaseous unpolymerized hydrocarbon monomers from low pressure-polymerized, low density ethylene-hydrocarbon copolymers.
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Bobst Robert W.
Garner Billy J.
Jacob Frederick W.
Renk Henry J.
Shedden John A.
Spitzer Robert H.
Union Carbide Corporation
Vicari Clement J.
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